“International control,” Oppenheimer immediately replies. The tremendous destruction of World War II, even before Hiroshima and Nagasaki, prompted a radical rethinking of the world political order. After the bomb was dropped on Hiroshima, Oppenheimer threw himself into working to control nuclear weapons. Even before the end of the war, world government advocacy had become a prominent feature of the political conversation in America. But that international control was to take the form of an agency with a strict monopoly on such activities.